package com.forezp.servicezuul.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

/**
 * @Description TODO
 * @Author XIONGCAIZHAI
 * @Date 2019/8/22 21:19
 **/
@Component
public class MyFilter extends ZuulFilter{
    
    private static Logger log = LoggerFactory.getLogger(MyFilter.class);
    
    @Override
    public String filterType(){
        /*pre：路由之前
        routing：路由之时
        post： 路由之后
        error：发送错误调用*/
        return "pre";
    }
    
    @Override
    public int filterOrder(){
        //过滤的顺序
        return 0;
    }
    
    @Override
    public boolean shouldFilter(){
        //这里可以写逻辑判断，是否要过滤，本文true,永远过滤。
        return true;
    }
    
    @Override
    public Object run() throws ZuulException{
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        log.info(String.format("%s >>> %s",request.getMethod(),request.getRequestURL().toString()));
        Object accessToken = request.getParameter("token");
        if(accessToken==null){
            log.warn("token is empty");
            ctx.setSendZuulResponse(false);
            ctx.setResponseStatusCode(401);
            try{
                ctx.getResponse().getWriter().write("token is empty");
            }catch(Exception e){
            }

            return null;
        }
        log.info("ok");
        return null;
    }
}
